I fabricated and installed a muffler delete on my 4.8i E70 over the weekend. It's a fairly simple job. Parts used were:
- 2x 90 degree 2.5" mandrel bends
- 4x 45 degree 2.5" mandrel bends
- 2x dual 3.5" outlet, 2.5" inlet stainless tips
- 2x 2.5" exhaust clamps
For those curious, 16 gauge 2.5" exhaust tubing slips PERFECTLY right over the OEM exhaust pipes where they enter the stock muffler. This setup is also extremely easy to swap back over to the stock muffler if need be (with an exhaust band clamp setup).
To tame down the rasp, I will be adding two small resonators in the muffler delete pipes (Vibrant Performance Part No. 1792). This shouldn't change overall volume much, but should even out the high-notes.
Update:
Added two Vibrant resonators. Sounds much better. Still has all of the low bass notes without as much raspiness. Cold start video:
